table alias without as fails to parse

Hello !

The following valid SQL statement fails to parse:

```sql
select my_alias.value from json_each('{"hello": "world"}') my_alias
```

It should parse the same as the following

```sql
select my_alias.value from json_each('{"hello": "world"}') AS my_alias
```

issue 中沒有指定來源檔案或測試。首先針對 parser 執行兩個 SQL 範例，並追蹤 FROM 子句資料表別名的進入點；當不帶 AS 的別名能夠成功解析，且其行為與明確引入的別名相同時，即表示完成。

由索引模型根據 Issue 內容生成。